Toys broken by idiot - forget about it (3,2,2)
I believe the answer is:
let it go
'forget about it' is the definition.
(thesaurus)
'toys broken by idiot' is the wordplay.
I cannot quite understand how this works, but
'idiot' could be 'tit' (both can mean a stupid person) and 'tit' is located in the answer.
The remaining letters 'lego' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for let it go that I've seen before include "Disney tune" , "Hit song from Disney's 2013 animated feature film Frozen" , "Refrain from comment" , "Excuse something" .)